CVE-2023-43566Network attack vector

Stored XSS via node configuration data

Published Sep 19, 2023 · Updated Sep 24, 2024

Stored XSS in JetBrains TeamCity before 2023.05.4 allows remote authenticated users to execute script in another user's browser. The vulnerable locus is the Nodes Configuration interface, but JetBrains has not disclosed which field accepts the payload or which output operation fails to neutralize it. Exploitation requires high-privileged access and a victim to view the affected configuration; reported effects are limited to browser-context data access or actions.

CVSS severity3.5
Low
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in JetBrains TeamCity before 2023.05.4 allows remote authenticated users to execute script in another user's browser. The vulnerable locus is the Nodes Configuration interface, but JetBrains has not disclosed which field accepts the payload or which output operation fails to neutralize it. Exploitation requires high-privileged access and a victim to view the affected configuration; reported effects are limited to browser-context data access or actions.

The record

CVE
CVE-2023-43566
Published
Sep 19, 2023
Updated
Sep 24, 2024
Vendor
JetBrains
Product
TeamCity
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2023.05.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

JetBrains · TeamCityversion=0 <2023.05.4

Published CVSS scores

3.5JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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